Transverse momentum distributions of quarks in the nucleon from Lattice QCD

Details Transverse momentum distributions of quarks in the nucleon from Lattice QCD Transverse momentum distributions of quarks in the nucleon from Lattice QCD

2008-11-10

arxiv.org/abs/0811.1536v1

Physics

High Energy Physics

High Energy Physics - Lattice

9 pages, 9 figures, submitted as PoS LC2008 053

Scientific paper

Transverse momentum dependent parton distribution functions (TMDPDFs) encode information about the intrinsic motion of quarks inside the nucleon. They are important non-perturbative ingredients in our understanding of, e.g., azimuthal asymmetries and other qualitative features in semi-inclusive deep inelastic scattering experiments. We present first calculations on the lattice, based on MILC gauge configurations and propagators from LHPC. They yield polarized and unpolarized transverse momentum dependent quark densities and enable us to test the assumption of factorization in x and transverse momentum. The operators we employ are non-local and contain a Wilson line, whose renormalization requires the removal of a divergence linear in the cutoff 1/a.

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